Yes, but variants are supported in the application, anti-chess, horde, atomic, three-check etc. Agreed, those are not really chess, as the rules or end conditions are significantly changed. But it's like chess960 chess, the pieces are on a different position or there are less pieces and a smaller board. The reason for my wish is that I want to play a small chess game with my son before bed, it should be a bit less daunting then a complete chessboard and only use a few pieces, so it would be both quick and easy. A time constrained regular chess game would be quick but less easy or usable for a young kid.